Self circulation lubricating cooling submersible electric pump

The utility model relates to a self circulation lubricating cooling submersible electric pump, which comprises an impeller, a guide blade body and a motor, wherein the motor is arranged in a motor case, the motor case is connected with the guide blade body through a motor end cover of the motor by a locking screw, the lower end of a main shaft of the motor sequentially passes through the motor end cover and the guide blade body to be externally connected with the impeller, and the main shaft is respectively supported on the motor end cover and the guide blade body through a radial bearing and a thrust bearing. The self circulation lubricating cooling submersible electric pump is characterized in that the thrust bearing, the main shaft and the guide blade body define a bearing cavity, the motor end cover and the guide blade body encapsulate an oil pool, and a lubricating hole is formed in the guide blade body or the thrust bearing or the main shaft, and is communicated with the bearing cavity and the oil pool.